Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e6054eb2575e41b066069cd2c8490ff398322261667353afa2c186b226572f30' 
  AND token = 'rFOJ+mcsmBCmLvjoetRuEEH97dtxFxfmIK9Qxmf3FWc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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