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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8edc5e902ca1bff4e1a79fbd17b2fa64022deeac517ad867fd7dd3b225ebd164' 
  AND token = '10klh+UenA+LQ8fBGCzCYL1HIzM2qNGV+PWsUUflH9g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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