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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd173fc10e510aedc3da059a6de85508d3c2915ed67942ebae514e6019ba23c0' 
  AND token = 'Y0gNCKh5Ncie97USdWlcWiKpoC9nj8Ryu8P20JK8sHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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