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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '443caf8cac2e47c64ccc2de4a81e7964d0ed3bfd53e6bf5a197c0cfb455233ef' 
  AND token = 'UbGzF4GzzhC79o1EQlKSr0zfpUNI5QywDGDYBry80ZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00088

JSON explain

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