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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30171c8aee940e41b0f3dc10a117eec922521aa0d910dd5a6070814512df8a6f' 
  AND token = 'WwP4w90YYN+Cd7lFXqOHP/U+Q4j+mT/O44WzDJbEn2c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00104

JSON explain

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