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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2406f4f5a6d8a9cd061572f167125e20bd60c5959fc150487d23cafedfae1fb3' 
  AND token = 'jJ+jdZNnZYFyu/ARhfynb4LG1p3cFSYZGKYcOdORkZE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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