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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cc1766750ff840f4297f96ac70d6432d87fa617298ae984bdb63572860050c83' 
  AND token = 'ILmoHl8V4Y1ClgmWkAAXT1HLKy0hM48WW8+oAKXdZiY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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