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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26b049411e222a151addd24e8875cb23f265d25f29e6f1fa91851495ebd0e92c' 
  AND token = 'Yk51+X16fDgNR2i4M0RSfNpUCxmiQTL6mejs6C7WYOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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