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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e9f1ae2fdd391d6c737fb5d1215407ac2e0a213594ffcc683ca53c6554fa158' 
  AND token = 'G7oUXWuUbUbSicfejVxWasbtUypGZj5K9QHqjg82J9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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