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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e418fe0a173f3e204d85ff2ca3e965f1577c5a3b4c557a9c5cdb8dd114d93ef' 
  AND token = 'BWYSacrW10q/PwDp3DUN8t6h3hFxfp5st7M0O4a4yos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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