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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '61330caf4e5cf8a29551a695376470cba13edd316f27c51321d5f6d69277d633' 
  AND token = '1ayd5nAT63r+SolsduGhkd7OeESRmEmo5YXO8Lghsik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}