Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e22bc8b1b7accc83726aef2f9923a818a74c91a8ba19c5d996faa5a1066844e7' 
  AND token = 'vIRDdeaIu2EP6VAfKxu8LXyeePUc8EK5W3wFT5C2KkI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}