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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dcf9e3347cd55f4fa6367f6a1308149992f885bd6b72c641e71d41feec2478f4' 
  AND token = 'SRL5ukUf+juF8U3BSHNo6MjcG8o+/dKYJCC8Aeopr9A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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