Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb2b55a628b0a57f02d6c2902c61168f795d8ef955da235ae446f00be1906d37' 
  AND token = 'NTvtAgFqf+W6ebsg+o+WHtgdvkRZa2PGAkgd57NoAcY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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