SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '20aa96f041b404a94061ec6325b912043cb5a576eb3e3eb4d2a8e7b69cf559ab' 
  AND token = 'sAK1gF+aAOxktzbUjjs7Q3uCXuKSu+qGsyJbiMPZlmI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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