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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e4e45da47a096c19377d55cf447a7a0e70bd5b4aa1853b545a9fbddd897e99ea' 
  AND token = 'YBzP8cqvG4VEPtNvXqQw2tID5/DV3/V80GFVdCsoQDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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