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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '67fa67a8918b9e1fba4ac3215feb33a7484a4cf275c4b047ceb3dcd382d9e894' 
  AND token = 'ykdx2Kqlfi4PgIvt3Hz6Pop+W2jf1sazUxq3Hfb7C1M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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