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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07f971796d1e5a5b6d9832c4ece2c9af027481eeacc83f839e411e22df6d4a64' 
  AND token = 'k9Mc/U403AjnOHdXX8+MsHswP4AejT+l+GLHqbEM73M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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