Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '971d9ef69750278847b85529019bbda1a5133077d9b1626125b7541537fbe02c' 
  AND token = 'EPoY9i2djEUjn5nWkrbbOs29O7TrCpjn2xKiQGzEAaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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