Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee0f09e4b0b00dda821034777e50a058e0d5ac2966cf7661b12eca45fc682e08' 
  AND token = 'xz/in7HQPFHFOlq3BW7C5PVFTkbtsKAbomqOnKjyoCg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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