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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bebf898cc5d7b14e90081f10b0fb3b6a583b53abdb1b6b76d2b8520822e931e1' 
  AND token = 'ttyb2Du0vuwT6PDuPsg/ROc8Ohpl/p6ZCmssRAcsA6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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