Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b182034de3dc0da78469bd513e7f696b52b1eadfbc664db99d6992b4292828de' 
  AND token = '4Mc+Kwr//qMpFOFVD0ZNAGq628QqB8tI2uOOVmKA72A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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