Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1dedf3b76ad69ccbc4c87f34dd5e58ab27a164911c5484b254670f24548d0bd' 
  AND token = 'tQYZi+CL3TPYFQwWb354koATHfE9XCEhN1qkds3Z3H4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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