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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22d276f5907b40b775911a89270a16d8a92a601df89224d18a11ab373314481a' 
  AND token = 'UiQIz3ztOg0m3x0Au7lItdUiN2ZarWjfo8YQ7mAfpEM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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