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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '005b355d8e6f594c0535cf9464def0ab9de74e990e2abbe497bdafda37b6e3d7' 
  AND token = '4z9VAuwbSzyUqK3CDgmA6Yyk/s2nZfpULE66OWyGOn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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