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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62013c8ad9a96a6994dfb7b4c32a42ce95d3b414b769ca8e5fe4c43973de207e' 
  AND token = 'tna3l9aeGz240TFOC33o0yXAyGu57v72rUSsBzaUAYI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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