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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee8a702ac40238caf210d5799c49681547a17966ed3fa40d4f656859ef2b06fc' 
  AND token = 'ZKm1BMF6C8I9sZGNeUlXv5hUccPPcaxova4S1QiZtOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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