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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2460077033b21038735b7366cb3a8008ff8c076bd538b3eec2d974ceff69997b' 
  AND token = 'wxc/we6oH9R78cgBlrjVpC3LtG8ykBQTm+FXy0H1A2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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