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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebb1376d42fa6b5ec799340b93d5b75671ad91ec94a27e551a39b2e7e490d891' 
  AND token = 'qIg8odRJBNdnSUYwrRj5jG45zi+b9DSeLreY4Ure7MA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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