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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a8cd8824364f15df59cd3d90ca7e192f13f2f71faa4301a657451347790d1b8e' 
  AND token = 'JCEolm90G3Q1fQX8+HSZBhuaTZd4pin3h7lC1e33d+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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