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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4d002aef38abf3207a5cb6aaa9494b715c769806eac56f0831745c7e01d5484' 
  AND token = 'LljwDSTjSAWxJE9o1A/dPrMmtT77Jc1JYq2Kk1EVBIM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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