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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e96a989ad21ffd411a19a4bb70059bf5fe40fdce64e5ebf8f7d5dccf9963ac4a' 
  AND token = '2ZcwQu21Holl7aHnRTwyK3+1TaeRN7S0V1Ctv9jtwg8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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