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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33024efb5ca663dcda34d47d988ed4e02162354bb7686b75f7a7533a9e2007df' 
  AND token = 'Eg2W7EHC8TQbQDlSTLZQz0F5udw6sJ1JBPvniLVeAOQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}