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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a0ecd156940fc66f222a31fb886340e8835e7a00bea459f6a08717fc2685dba' 
  AND token = '1jCTtAlVRK6vA01U+FF3Pau1vGyoQxBpLl6ousHEEus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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