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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5734a0980f76e7859e8b367b6ce0abea4fe0517a8dcf2767718f3033548e1efa' 
  AND token = 'vq5kyVMrl4bAwVpMx651Z6PoFLAFlZ8wp+IzdL0rNJM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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