Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ca3d5cdcd9436e75026f673970867e3163bd900d697fe2be73267f07ce1fe1c' 
  AND token = 'CrvNtdAcZTfUN/D1aKmb9xAu0SghwQp9wYzLWJev7Lw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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