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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcba6263c58b9cf0ce41ec425a65e58d046d7ec57f5affe59e03a37c9ef22229' 
  AND token = '3tPr8MKDtzG0A9s2C+Kloz+HLQZxux9kQ7ytNLp8D7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00134

JSON explain

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