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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '350f1dd726a27eb0e708622b68d8d8f10bbdbbe8c332c0ddf5ad0b9ec212f8ba' 
  AND token = 'P1Vkg/z3lyi7v5Xv3KOOcpHahQgpIWyN70zhmdv3MFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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