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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fd9ff102b2980dd42657c5c4b5acad77bf2e7791f07c49d39ecebe91bc061cc2' 
  AND token = 'Y08p1BQxmTBSBh/M/F/YheXe9pcm9k3sr2Wl8e7Rvpw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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