Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '760abc4503af7ef0f6934ed1f0608d61a476e5ef4df7a9ed9a2dbe79f67abeb2' 
  AND token = 'aPFt5J/HJOhSldeyWddl26rcFckEb29sl97mnxXnT4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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