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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e092fb5d66a5edd69ee4414a0dc0308026701b39cf004f743d84884d4424731' 
  AND token = '3plvveUt6cDuJqC6U6sV6rSCOdKIQ6RCfJpHdcmOU84=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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