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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b5d5ced0cd0c902e2b041183c756462df7f4696638e2b593634eb5a36ee57cc' 
  AND token = '6cGT3o+YQ7Ju4NBV2yns7/weV8Y85zdeowzxq1aFki4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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