Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '82c1d4f9939e9f0a47950a06bd5c2b558d20449501bdb19ef3f6adf83fe3eddd' 
  AND token = 'g3eLAkOEis3ErBWE9I3hkm/PVyurePbGv4JmsNjRCf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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