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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1654eabcd139a8ae8f4075bc99ddc593259633afa37b0c59624198934adb55ab' 
  AND token = 'BjnJwfL9VIOfmTLDQG9A5VLm+1412RusX5P3Y0XNPF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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