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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d2a0855d37f66741b24e56477628430fad45835f9db4672de0c6b71adbe8821' 
  AND token = 'ALMG816Dr9fk/FwOnNS758rG0t+ytDUO3FACfKYiJZo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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