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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ea72f9662e9ed223bd44a189c22c27c8af98d48dbac5f7dcebd5f3dc15def02' 
  AND token = 'NdttA7QRjaxwKFOmPNQus1vq8E+/gnuf9hKW6bhtA40=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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