SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60f932d732b28615108c4c9fc2a1997919ec1bdf622025e8bd958d16b20b8c5f' 
  AND token = 'Y+DKDykhb8CTAUXdVdA9fSuYqlOwsZFETB2FCzJ6Z2Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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