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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9c829a5d04fc67c1f7c582a59e5285cbec8d2fcbcfdc568639552d4685720fd' 
  AND token = 'zoqkZxNSBVhDYZW/S0CCoKV4APGwn2U9hD8xY59LSlk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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