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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f09d8f9ea946cf3f5b1ecd2a055ddb5cdb29de28c1989df9eaea09adc2d7737' 
  AND token = 'IpZYpLz1bNy50311CcQ5X7BSZV1yUTgNgjqiQFhVda8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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