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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0e9490685a39e0d3e22fbdd1abf3b4ccab2656b67b128875a58e7edbdf1c6042' 
  AND token = 'ZHRHKZKZ6zdaqClyH7X885Eu9X5rS85BNbM44hJWa4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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