SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c60985e51c02d47025799c0e0832bb0e81f04bf76d7b05bb5e5fbd625f3f485d' 
  AND token = 'oJ2MLurCsuIVT3J1qdcYTH7WKU8xtTVV/pHLBCwponk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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