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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4d3905183ac6ace741fb72444b328bf317775328db80e16193fcda3cb4194bc3' 
  AND token = 'I1qKPOJzawC4jk766dd3VIxq8qf5njKKhhNBbkoaC5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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