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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c7ac1b7655f34804b936b65d9903f450b2bb2dd3c5ec51b9b59816a76c2a2c4' 
  AND token = 'm9cvUA0fU0iI9jwhWOEe3RDCr5Lx74gNQhgj0wBY7kw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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