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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '693720a98cf6863a0dc9eb90f5afb2af3e8ddda5bb6fa59a233eccae215f0d89' 
  AND token = '+dQqnHDPC2G8xT0WvpLxfXcU0D/gB/9q6nKDVYri7YE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00072

JSON explain

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