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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65d6c1cbcfa681102c327c5f7e27d6c9d32553d46f77c0a3a39b68f5fbe52758' 
  AND token = 'Dn2AzPPVXOUn+J/r2OkKJ+l0/i0M1OTUXIrDKtUiwaU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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