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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9492d2318486f38b99b4100eff2680447a903ebef63316a40fbf28c41e6d8d67' 
  AND token = 'SPWEQLqJMTAdERnYwGMZSrw7R2U0kaCz7Ip9HLtSkx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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