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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '094852580d6c7937e6187ba6b8f8692a6c43caaeab7e4260122c9cd60dd8a8e4' 
  AND token = 'yv80nYtuLS+kEJjC3EhxU+bl5Fz5kfATvFRWd3V2Q54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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