Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b04618322cd9b608494608cba20a56279c717439bb0157163d57c385c64c6ed5' 
  AND token = 'VvH1SPgPzxAoi2nA4re0Rn3t2rJjcEVZvV3+wqIQLX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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