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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bfde58c926ad9facddd999f27c871ed9af0f2b62396777df45f851eb94142e50' 
  AND token = '9qwQbReNbP8ifcQyQlIH99J5JAgZhGsmGbpiPjLo8us=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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