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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60d95c33b08d4d6de2b2287963da0c39add4bf4d14a3adbef9800b5b7fdd5986' 
  AND token = 'iCzMOt1iptHwIwXrPFhQxo0dwoClPC28vsKmX+XWAcU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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