Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94e1cf994a001298e0a22191acaff77cfaecbbb44de35522596a3dca0ac5e915' 
  AND token = 'jvlWvOKVOnDVXz9ly/UBATZey4lz2zLjhpC2cUQ3jv0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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