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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '111f310062495ff7ea7d2fa392780f80b96662b13db3a26c3a03085f5163e749' 
  AND token = 'N8xM9F7TuUGbUzYpK5U1fHQQXTx5TMvArpAWiRwTSoc=' 
  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"
    }
  }
}