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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54e7540313d4147596396e469fd4b64ff04c95d5e60a11ef63bbd7dadfda819b' 
  AND token = 'S3wQ3JWhdC2VYQXwqF4RTUsijjFvRteji1qCcK6c4ro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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