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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '813e9a18bfaa207973f00e90a8930f12936cc673405d532db55661a6829dba72' 
  AND token = 'b+oCuA0NADoV3tqa1OdkMf/ZHtHsoqkyZUfuMdZV1LI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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