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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4aed396288165c3ef8ada77c352a26ecaf8afe1d0954942b9d23ce7b612eb263' 
  AND token = 'L8v0/K8K1qZ0H34iXXKuomF77kc5bBQ/CnYXVGIEioA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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